sounds like tranny failure is somewhat common on these models sorry man i was interested in your post as i had an ses taurus puke its guts out after a mountain pass thing still sporadically worked going down the mountain but shuddered like no ones business above mph while in gear and accelerating we traded it in the next day for and nissan altima with an equally shitty transmission which is a story for another time from a quick google search cut your losses and move on these trannys are prone to myriad problems and theyre not worth dealing with